Fix win build

Author: cataphract

config.w32

@@ -7,7 +7,7 @@ if (PHP_LIBARCHIVE != "no") {
 		CHECK_HEADER_ADD_INCLUDE("archive.h", "CFLAGS_ARCHIVE",
 			PHP_LIBARCHIVE + "/include;" + PHP_PHP_BUILD + "/include")) {
 
-		EXTENSION("archive", "libarchive.c stream.c", true, "/DLIBARCHIVE_STATIC");
+		EXTENSION("archive", "libarchive.c stream.c", true, "/DLIBARCHIVE_STATIC /Zc:preprocessor");
 
 		// Always-needed Windows system libs.
 		var libs = "bcrypt.lib xmllite.lib crypt32.lib ws2_32.lib";

libarchive.c

@@ -92,7 +92,14 @@ static void entry_oh_free_obj(zend_object *zobj)
 #define _DJB_PASTE(a,b) a##b
 #define _DJB_SEL(n)     _DJB_PASTE(_DJB_,n)
 /* zend_inline_hash_func sets the high bit of the result */
-#define DJB(...) (_DJB_SEL(_DJB_COUNT(__VA_ARGS__))(__VA_ARGS__) | ((zend_ulong)1 << (8 * sizeof(zend_ulong) - 1)))
+/* MSVC C mode rejects sizeof in case-label constant expressions; derive the
+   high bit purely from bitwise ops so both compilers are happy. */
+#ifdef _MSC_VER
+#define _DJB_HIGH_BIT ((zend_ulong)~(zend_ulong)0 ^ ((zend_ulong)~(zend_ulong)0 >> 1))
+#else
+#define _DJB_HIGH_BIT ((zend_ulong)1 << (8 * sizeof(zend_ulong) - 1))
+#endif
+#define DJB(...) (_DJB_SEL(_DJB_COUNT(__VA_ARGS__))(__VA_ARGS__) | _DJB_HIGH_BIT)
 
 #define ENTRY_HASH_PATHNAME      DJB('p','a','t','h','n','a','m','e')
 #define ENTRY_HASH_SIZE          DJB('s','i','z','e')